Across
1
Largest river in South America
5
Tool for finding directions
6
Line dividing two countries
7
Flat grassland in tropical regions
12
Imaginary line around the middle of Earth
13
Physical features of land
Down
2
Low area between mountains
3
Where river meets the sea
4
Large area covered with trees
8
Region near the equator
9
Large slow-moving mass of ice
10
Flat elevated area of land
11
Cold treeless Arctic plain